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one of these near the Zoological Gardens he had taken from 
between the walls of the limestone, 30 feet from the surface, 
Ammonites, Echini, Foraminifera, and other organisms of Lower 
Lias age. From another near the Suspension Bridge he had 
taken fish remains of Rhetic age, including Saurichthys apicalis 
and Acrodus minimus. In the veins on the Mendips he had 
found numerous examples of Saurichthys and Acrodus and the 
same reptilia. From this he concluded that the deposits were 
equivalent in time, and that the Durdham Down Conglomerates 
must be referred to the Rhetic age rather than to that of the 
Magnesian Limestone. 
In November, 1880, he recurs again to this subject in a paper 
before the Geological Soc., (Q. J. G. 8., vol. XXXVii., p. 67, 1881) and 
reviews the decision he had before arrived at, that the Thecodon- 
tosaurus and Paleosaurus were of Rhetic age. He gives further 
particulars of the Secondary deposits near Frome, and describes 
the occurence of Post Pliocene, as well as Rhetic and Liassic 
deposits, at the Microlestes quarry at Holwell. Similar infillings 
occurred in the Bristol area, at Durdham and Clifton Downs, in 
the Avon gorge, at Ashton, Westbury-on-Trim, Nettlebury 
quarry, near Wickwar at Yate, Clevedon, and on the Thornbury 
railway ; these contained fossil remains of different geological ages. 
The reptilia from the Conglomerate on Durdham Down had been 
referred to the base of the Keuper. Lately he had found teeth 
of the Thecodontosaurus, indentical with those of the Bristol area, 
from the middle of the Upper Keuper at Rushton, near Taunton ; 
recognizing certain differences between these teeth and those of 
the same genus from the Rhetics at Holwell, he was led to 
abandon the notion that the former were of Rhetic age, and now 
referred them to the Upper Keuper, thus placing them a little 
lower down in the geological horizon. In the discussion which 
followed, the President (Robt. Etheridge, Sr., F.R.S.,) congratu- 
lated the writer on the industry and skill shown in the collection 
of the materials on which the paper was based. 
